Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K16/00—Machines with more than one rotor or stator
  • H02K16/02—Machines with one stator and two or more rotors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/26—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings
  • H02K23/36—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings having two or more windings; having two or more commutators; having two or more stators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
  • H02K23/405—Machines with a special form of the pole shoes
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
  • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
  • H02K23/42—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits having split poles, i.e. zones for varying reluctance by gaps in poles or by poles with different spacing of the air gap

Definitions

• This invention relates to direct current motors and more particularly to multiarmature motors having coils or magnets interposed between parallel pole plates establishing a plural- ity of magnetic pole shoes for exciting armatures.
• the relationship of magnetic material (iron) and magnetics is the most difficult problem to overcome in a DC motor. Because the iron used to make up the segments of the winding lobes of the rotor are naturally attracted to the magnetics of the field an unfavorable or counter electromotive force is created. The force of repulsion is not utilized and limits the use of favorable forces. The unfavorable force must be overcome as each segment of the rotor passes through the magnetic field.
• This invention substantially increases the magnetic flux on a motor armature by applying magnetic flux of the same po- larity to both ends of a plurality of rod-like pole shoes attached to and extending between a pair of magnetic coils and adjacent the periphery of an armature interposed between the coils.
• Background Art The most pertinent patent is believed to be United States patent number 4,221,984 issued to Mason on September 9, 1980 for STATOR FOR MULTIPLE ROTOR DC MAGNETIC MOTOR.
• This patent discloses some of the features of the motor of this invention, but does not disclose the feature and advantage of magnetic flux of the same polarity applied to both ends of respective pole pieces of opposite polarity extending longitudinally of an armature. This patent also does not disclose the advantage of additional pole shoes and their location for obtaining desired torgue and speed of the armature with relation to efficient use of input amperage as disclosed by this invention. Disclosure Of The Invention In a first embodiment, a pair of iron core coils are re- spectively disposed between two pairs of pole plates in axially aligned spaced apart relation and form North N and South S poles of the respective pair of pole plates.
• a motor armature is disposed in axial alignment between the pole plates with one end portion of the armature drive shaft projecting axially through one hollow coil core.
• a pair of North N magnetic pole shoes are disposed dia- metrically opposite each other with respect to the periphery of the armature and are connected at their respective ends with the North N pole plate of the respective coil and intermediate their ends bridge the South S pole plate of one coil.
• a second pair of South S pole shoes diametrically opposite each other extend longitudinally of the armature in 90° spaced relationship with respect to the North N pole shoes and are similarly connected with the South S pole plate of the respective coil and intermediate their ends bridge the North N pole plate of one coil.
• Normally generated magnetic current concentrates the strength of the polarity forces in the center of the magnetic pole core, e.g., a North pole of a magnet has its greatest strength at the center of the North pole. The same is true for the South pole.
• the magnetic forces when realigned within the field of the motor become absolute and operate at a consistently uniform pattern. Realignment of these forces capitalizes the maximum use or conversion of the energy into output torque and speed at the shaft of the motor.
• This invention realigns these forces in a uniform plane by connecting the like poles of one or more magnetic members to carrier plates of soft iron.
• the respective soft iron plates attached to the like poles of each of the magnetic members allow the forces to be utilized as a uniform pattern of magnetic flux regardless of their path as long as the air gap between the carrier plates is constant.
• This application of uniform magnetic flux allows several usable configurations, within the field, to be constructed to direct the flux to the rotor.
• the uniform patterns of flux forces it is now possible to utilize the total effects of the two opposing forces, attraction and repulsion (force and counterforce) of the same polarity, of both the field and the rotor, and eliminate the unfavorable force that would normally be present.
• the pole shoe is longitudinally divided into three parts. Two of the parts form dual pole shoes located precisely in relation to the winding of the rotor and the third part serves as a separation of the dual pole shoes.
• the separation or division of a single pole shoe into two pole shoes operating in the same area of the armature field removes the potential of the unfavorable forces normally found in conventional DC motors. This occurs at each of the opposing magnetically supplied field working forces.
• Figure 1 is a top view of one embodiment;
• Figure 2 is a vertical cross sectional view taken sub- stantially along the line 2 2 of Fig. 1;
• Figure 3 is a longitudinal cross sectional view taken substantially along the line 3 3 of Fig.
• Figure 4 is an isometric view with one housing side wall, the coil wires and the armatures removed for clarity in showing the relative location of the respective pole shoes;
• Figure 5 is a fragmentary vertical cross sectional view, to a larger scale, illustrating the relationship of one mag-netic pole shoe relative to the periphery of an armature wind-ing;
• Figure 6 is a wiring diagram;
• Figure 7 is a top view of another embodiment;
• Figure 8 is a vertical cross sectional view, taken sub- stantially along the line 8 8 of Fig.
• Figure 9 is an isometric view with one housing side wall, the coil wires and the armatures removed for clarity to show the relative location of the respective dual pole shoes; and, Figure 10 is a fragmentary vertical cross sectional view, to a larger to scale, illustrating the relationship of one pair of dual magnetic pole shoes relative to the winding of an armature.
• the reference numeral 10 indicates a first embodiment of the motor as whole comprising a nonmagnetic housing 12 supporting a magnetic motor frame work 14.
• the frame work 14 comprises three pairs, in the example shown, of pole plates 15-16, 17-18 and 19-20 disposed in spaced-apart coaxial aligned relation within the housing 12.
• Soft iron coil cores 21, 22 and 23 are axially disposed between and connected with the pairs of pole plates 15-16, 17-18 and 19-20, respectively, with the cores 21 and 23 being tubular for the reasons presently explained.
• a wire or wires is wrapped around the respective coil core 21, 22 and 23 to form a like plurality of coils 24, 25 and 26 with the wires around the center coil 25 being wrapped to supply sufficient magnetic flux for the desired operative task.
• Armatures 28 and 30 are axially interposed between the center coil 25 and the end coils 24 and 26, respectively.
• the axle 32 of the armature 28 projects through the hollow coil core 21, and is supported by bearings 36 and 38 respectively secured axially to the pole plates 15 and 17.
• the axle 34 of the armature 30 projects at one end portion through the coil core 23 and is supported by bearings 40 and 42 axially connected with the pole plates 20 and 18, respectively.
• the respective end portions of the armature shafts 32 and 34 are thus coaxial with the magnetic center of the adjacent opposing polarity coil pole plates.
• a pair of elongated rod-like North N pole shoes 50 and 52 extend in longitudinal diametrically opposite parallel relation with respect to the armatures 28 and 30 and are connected with the North N pole plates 15, 17 and 19.
• Diametrically opposite recesses 54 and 56 are formed in the pole plates 16 and 18 for isolating the respective North N pole shoe 50 and 52 from contact with the South S pole plates 16 and 18.
• a substantially identical pair of South S rod-like pole shoes 60 and 62 spaced 90° with respect to the North N pole shoes 50 and 52 are connected with the pole plates 16, 18 and 20.
• Diametrically opposite peripheral portions of the pole plates 19 and 17 are recessed, as at 64 and 65, respectively, to isolate the South S pole shoes 60 and 62 from contact with the South S pole plates 19 and 17.
• the respective pairs of pole shoes of the diametrically opposite pairs of pole shoes 50, 52 and 60, 62 Fig.
• each pole shoe has a longitudinal peripheral por-tion of their surface milled out on a radius slightly greater than the radius of the respective armature 28, 30 to define a concave recess or arc 63 (Figs. 2 and 5) on each pole shoe, of the pairs of pole shoes, preferably having a transverse width at least substantially equal with one-half the winding span of the respective armature 28 and 30.
• the arc 63 of the respective pole shoes is thus substantially equal to an arc spanning three and one-half segments 67 of a seven span armature.
• the preferred radial spacing between the periphery of the respective armature and the arcuate recesses 63 is not less than 0.015" or greater than 0.0394" (0.04 cm to 0.01 cm).
• the reference numeral 10' indicates a second embodiment of the motor in which like nu- merals refer to identical parts and prime numerals are used to indicate modified pole shoes and other components.
• the principal difference between the motor 10 and the motor 10' is, the number of pole shoes has been doubled.
• the pole shoes 50 and 52 are replaced by dual pole shoes 50'-50" and 52'-52", with the dual pole shoes occu- pying substantially the same positional relationship relative to the respective armature 28 and 30.
• the dual pole shoes 50'-50", 52'-52", 60'-60" and 62'-62" are each provided with a longitudinally extending concave arc 63'.
• each arc 63' is preferably substantially equal with one-third the winding span of the respective armature 28 and 30 with a one-third winding span gap or space 51' between the dual pole shoes as diagram- matically illustrated by Fig. 10.
• the radical spacial relationship of the dual poles relative to the armature is identical for that described hereinabove for the motor 10.
• the addition of four pole shoes for each opposing pair of pole shoes versus the single pairs of pole shoes of the motor 10 results in substantial increase of torque and speed of the motor 10' relative to the motor 10 without an increase of amperage required for the operation of the motor. Operation Other wiring 69 (Fig.
• pole plates 16, 18 and 20 form South poles and South magnetic flux is applied to the respective ends of the South pole shoes 60 and 62 or 60'-60" and 62'-62" resulting in an equal and opposite polarity magnetic flux density which cooperates with the magnetic flux in the North pole shoes in acting on the armatures 28 and 30.
• pulleys, not shown, or other drive means may be secured to the outwardly projecting end portions of the arma- ture drive shafts 32 and 34.

Applications Claiming Priority (3)

Publications (2)

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ID=22581411

Family Applications (1)

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Citations (4)

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• 1993
  • 1993-12-06 US US08/161,494 patent/US5367215A/en not_active Expired - Fee Related
• 1994
  • 1994-10-11 AU AU17240/95A patent/AU1724095A/en not_active Abandoned
  • 1994-10-11 CA CA002176396A patent/CA2176396A1/en not_active Abandoned
  • 1994-10-11 KR KR1019960702897A patent/KR960706705A/ko not_active Application Discontinuation
  • 1994-10-11 WO PCT/US1994/011466 patent/WO1995016298A1/en not_active Application Discontinuation
  • 1994-10-11 EP EP94931807A patent/EP0733278A4/de not_active Withdrawn
  • 1994-10-11 CN CN94194414A patent/CN1136866A/zh active Pending
  • 1994-12-22 TW TW083109791A patent/TW269068B/zh active

Patent Citations (4)

Non-Patent Citations (1)

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